Mtundu wolemba pulogalamu resistor. Chikhazikitso mphamvu resistors chiwembu

Madera magetsi kwa resistors panopa kusintha ntchito. Kupezeka ndi mitundu yosiyanasiyana ya iwo. Kuganiziratu zonse zosiyanasiyana zokhudza chilichonse chizindikiro Muzifunsa resistor lapansi. Iwo amalembedwa m'njira zosiyanasiyana, malingana ndi kusinthidwa ndi.

mitundu ya resistors

Resistor - chipangizo kuti ali ndi kukana magetsi, ntchito yake yaikulu - panopa kuchepetsa dera. Makampani umabala zosiyanasiyana resistors ntchito zosiyanasiyana zipangizo luso. Gawo lawo ikuchitika m'njira zosiyanasiyana, mmodzi wa iwo - chikhalidwe cha kusintha mu kukana. Malinga ndi gulu ili chimasiyanitsa mitundu 3 resistors:

1. Atathana resistors. Iwo si zotheka kuti amangosankha kusintha kuchuluka kwa kukana. Mwa maikidwe, iwo anawagawa mitundu iwiri: onse ndi yeniyeni ofunsira. Yotsirizira agawanika pa kusankhidwa mwatsatanetsatane, mkulu-impedance, mkulu-voteji ndi pafupipafupi mkulu.
2. Variable resistors (iwo akutchedwa kusintha). Angathe kusintha kukana mwa ulamuliro khasu. Pa kapangidwe Iwo osiyana kwambiri. Pali bafa ndi lophimba ndi awiri, patatu (ie pa olamulira womwewo okonzeka ndi awiri kapena atatu resistor) ndi mitundu zina zambiri.
3. Trimmer Resistors. Agwiritsidwa yekha pa dongosolo chipangizo luso. atakhala matupi zilipo yekha pansi screwdriver a. Zinabala ambiri zosintha osiyanasiyana resistors izi. Iwo ntchito mitundu yonse ya zipangizo zamagetsi ndi zipangizo kuyambira mapiritsi makhazikitsidwe lalikulu mafakitale.

Ena mitundu takambirana resistors otchulidwa pansipa amaoneka mu zithunzi.

The njira gulu la ogwiritsa zigawo

Pali 3 Mitundu ya zigawo ogwiritsa pakompyuta, wokwera tinkawasindikiza ndi micromodules. Pakuti mtundu uliwonse wa unsembe ndi zinthu zake zimasiyana kwambiri onse kukula ndi kapangidwe. Ntchito pamwamba ogwiritsa resistors, capacitors ndi semiconductors. Zilipo ndi kumam'phunzitsa zouluka, kuti iwo akhoza soldered mu dera la. Chifukwa miniaturization zinthu zamakono, njira iyi pang'onopang'ono kutaya zoyenerera.
PCB ntchito yaing'ono-kakulidwe mbali ndi adzatitsogolere kwa soldering kuti dera bolodi kusindikizidwa kapena popanda iwo. Pakuti mankhwala awa ndi mbali dera ndi mapadi kukhudzana. Kusindikizidwa Kulumikizana kwambiri anathandiza kuchepetsa kukula kwa mankhwala amagetsi.

Kusindikiza ndi ogwiritsa mikromodulnogo kawirikawiri amagwiritsidwa ntchito smd-resistor. Ang'ono kwambiri kukula, zosavuta aphatikizire ndi mfuti za makina mu dera bolodi kusindikizidwa ndi yaying'ono-zigawo. Zilipo zosiyanasiyana mwadzina kukana, mphamvu, ndi kukula. The zipangizo zamakono ali makamaka ntchito smd-resistor.

kukana mwadzina ndi yokutidwa resistors mphamvu

Standard kukana, m'kukoma ohms kapena megohms kiloomah, ndi khalidwe yaikulu ya resistor lapansi. Khalidwe limeneli zikusonyezedwa ndi zithunzi dera amanena mwachindunji ku resistor code alphanumeric. M'zaka zaposachedwapa, nthawi zambiri anali ntchito resistors mitundu yosiyanasiyana.

The chachiwiri chofunika kwambiri khalidwe la resistor ndi - izo mphamvu madyaidya ndikuledzera, tisonyeza zimenezo mwa Watts. resistor aliyense ndi kudutsa panopa kudzera ndi mkangano, i.e. dissipates. Ngati mphamvu kuposa phindu chovomerezeka cha resistor kumasiyanitsa chiwonongeko. Mu muyezo kalembedwe resistors mphamvu mu chiwembu pafupifupi zopezeka, mtengo uwu inakwaniritsidwa ndi nyumba yake.

Kulolerana mwadzina kukana ndi kudalira kwake pa kutentha

Chofunika kwambiri ndi kulakwa kapena zopatuka mtengo mwadzina, amayezedwa kuchuluka. N'zosatheka ndendende kubala resistor ankati ndi phindu kukana chofunika kukhala kupatuka pa mtengo anakonzeratu. zolakwa lasonyezedwa mwachindunji pa thupi, zambiri mwa mawonekedwe a kachidindo mikwingwirima akuda. Akuti ngati kuchuluka kwa mtengo mwadzina kukana.

Kodi pali kusinthasintha lalikulu kutentha, ndi ndithu kukana phindu lili kutentha kudalira kapena kutentha koyefishienti kukaniza, achidule - TCR monga amayezedwa mayunitsi wachibale wa ppm / ° C. TCS limasonyeza gawo la kulimbikira mwadzina la kusintha resistor ngati ukuwonjezeka yozungulira kutentha (amachepetsa) ndi 1 ° C.

Makonzedwe mawonekedwe kalembedwe resistor dera

Pamene kujambula madera amafuna kusunga GOST 2.728-74 makonzedwe pa zophiphiritsa likutipatsa (ASB). The resistor a mtundu uliwonse - ndi rectangle 10x4 mm. Pa m'munsi zithunzi zake analengedwa kwa mitundu ina ya resistors. Kuwonjezera ASB, lomwe chofunika mphamvu resistors mu dera, izo facilitates kuwunika kwa kusaka. Mu tebulo pansipa zalembedwa pa ASB zonse kukana, zikusonyeza mphamvu madyaidya ndikuledzera.

Pansipa chithunzi limasonyeza resistors atathana mphamvu osiyana.

Makonzedwe mawonekedwe kalembedwe wa resistors variable

ASB variable resistors chagwiritsidwa mfundo komanso resistors mapulani monga boma muyezo GOST 2.728-74. Tebulo chimasonyeza chithunzithunzi cha resistors izi.

Chithunzi zosintha ndi trimmer ali pansipa.

Standard resistors chikhazikitso

mfundo mayiko potanthauza kukana mwadzina la resistor mu dera ndi resistor ndi zosiyana pang'ono. Malamulo a kalembedwe imeneyi, pamodzi ndi zitsanzo za zitsanzo amaoneka tebulo.

Tebulo limasonyeza kuti lakuti mu njira ya resistors zonse kukana anapanga malamulo alphanumeric, choyamba pali phindu n'zosangalatsa kumva kukaniza, ndiye mayunitsi a kayesedwe. Thupi waukulu resistor lavomerezedwa mu signage digito m'malo koma kuti ntchito kalata ngati ohms, anaika R E kapena, ngati kiloomah, ndi K. kalata Pamene chodetsa megohms m'malo koma ndi ntchito kalata M.

Mtundu 'kala' ikusonyeza wa resistors

Mtundu 'kala' ikusonyeza wa resistors anapangidwa kukhala kosavuta kuika mfundo maonekedwe luso nyumba zawo. Kuchita izi, ntchito n'kupanga mtundu angapo mitundu yosiyanasiyana. Monga akuti n'kupanga anapanga mitundu 12 yosiyanasiyana. Aliyense ali mwini zenizeni tanthauzo lake. Mtundu malamulo umagwiritsidwa ntchito resistors m'mphepete pa molondola otsika (20%) umagwiritsidwa ntchito pa Mzere 3. Ngati ndi lolondola pamwamba, kulimbikira Tingaone kale 4 n'kupanga.

Pamene mkulu mwatsatanetsatane resistor umagwiritsidwa 5-6 n'kupanga. Mu chodetsa munali 3-4 n'kupanga, woyamba awiriwa chikuimira phindu kukana, Mzere wachitatu - ichi ndi multiplier, ndi kuchulukitsa ndi mtengo uwu. Kenako gulu ndi mwatsatanetsatane resistor. Pamene chodetsa limapangidwa 5-6 n'kupanga 3 zogwirizana ndi kukana choyamba. Kenako gulu - chinthu, 5 Mzere limafanana ndi molondola ndi 6 - kutentha koyefishienti.

Kuti decrypt zizindikiro mtundu wa resistors, pali osakira podyerapo.

Resistors SMD

Zimaonekera Phiri - ndi pamene zonse ali pa bolodi kwa m'mabande kusindikizidwa dera. Pankhaniyi, musati kubowola mabowo kwa ogwiritsa zigawo, iwo soldered kuti m'mabande a. Chifukwa ntchito imeneyi unsembe umabala osiyanasiyana smd-zigawo: resistors, diodes, capacitors, michenga yopangira zida zamagetsi zipangizo. zinthu izi zimakhala zazing'ono ndi sayansi yoti msonkhano makina. Kugwiritsa smd-zigawo angathe kuchepetsa kukula kwa mankhwala amagetsi. Pamwamba phiri zamagetsi pafupifupi kuimirira mitundu ina yonse.

Ndi ubwino onse a unsembe ankaona ngati ali zingapo zovuta.

1. Kusindikizidwa dera bolodi yotentha ndi njira imeneyi, mantha ndi zina katundu makina mantha, monga smd-kuonongeka zigawo izi.
2. zigawo izi amaopa kutenthedwa pa soldering chifukwa cha kusiyana amphamvu, iwo akhoza osokoneza temeratury. chilema kuli kovuta kudziwa, izo kawirikawiri amapezeka pa ntchito.

Standard lakuti smd-resistor

Choyamba-smd resistors ndi zamitundu yosiyanasiyana. Laling'ono kukula - 0402, pang'ono - 0603. The kwambiri adamthamangira smd-resistor kukula - 0805, ndipo kwambiri - 1008, kukula kwake zotsatirazi 1206 ndi yaikulu - 1812 resistors ndi kukula ochepa ndi mphamvu kwambiri.

Chikhazikitso smd-resistor ndi kachidindo wapadera lapadera. Ngati resistor kukula 0402, amene ali wamng'ono, si chizindikiro. Resistors miyeso ina Komanso amasiyana kulolerana mwadzina kukana: 2, 5, 10%. resistors onsewa amalembedwa ndi manambala 3. Woyamba ndi wachiwiri kwa iwo awonetsa mantissa, lachitatu - ndi multiplier koyefishienti. Mwachitsanzo, malamulo 473 awerengedwa monga R = 47 ∙ March ¹⁰ ohms = 47 ohms.

resistors onse, omwe kulolerana 1%, ndi kukula pa 0805, amalembedwa ndi manambala anayi. Monga momwe zinalili m'mbuyomu, ziwerengero woyamba kusonyeza mantissa chipembedzo, ndi chinthu limasonyeza manambala lomaliza. Mwachitsanzo, malamulo 1501 kutanthauziridwa motere: R = 150 ∙ January ¹⁰ = 1500 ohms = 1.5 kOhm. Mofananamo, werengani zonse za ndondomekozi.

Lingaliro losavuta

Zoti zoona njira ya resistors ndi zinthu zina - chofunika miyezo ya boma kamangidwe ka mankhwala a pakompyuta ndi magetsi. Iwo ataya malamulo pa zizindikiro za resistors, capacitors, inductors ndi mbali zina dera. Mu chithunzi limasonyeza osati resistor kapena zina mchitidwe dera, komanso kukana ake mwadzina, ndi mphamvu, ndi capacitors - ndi voteji opaleshoni. Pansipa pali chitsanzo cha mfundo zosavuta ndi zinthu anatchulidwa muyezo.

Nzeru za ochiritsira likutipatsa kalembedwe ndi kuwerenga zizindikiro alphanumeric nyengo chiwembu azidzapereka mosavuta mfundo za machitidwe a dera la. Nkhaniyi ikufotokoza resistors yekha ndi zinthu dera kwambiri.